Cita APA (7a ed.)
Duvall, F. P. (1983). The Structure and ontogeny of corvine social play of the rook (Corvus frugilegus, L.) and the hooded crow (Corvus corone cornix, L.). Freie Univ., Fachbereich Biologie.
Cita Chicago Style (17a ed.)
Duvall, Fern Park. The Structure and Ontogeny of Corvine Social Play of the Rook (Corvus Frugilegus, L.) and the Hooded Crow (Corvus Corone Cornix, L.). Berlin: Freie Univ., Fachbereich Biologie, 1983.
Cita MLA (9a ed.)
Duvall, Fern Park. The Structure and Ontogeny of Corvine Social Play of the Rook (Corvus Frugilegus, L.) and the Hooded Crow (Corvus Corone Cornix, L.). Freie Univ., Fachbereich Biologie, 1983.
Precaución: Estas citas no son 100% exactas.